Check of serviceability of a condition and replacement of the thermosensitive valve of turns of fast idling (FIT)

The FIT valve is established on some models of cars and is used for increase of turns of idling at the expense of supply of additional air in the inlet pipeline in the course of engine warming up.

Check

PERFORMANCE ORDER

1. At the moment of the check beginning the engine should be in a cold condition. Disconnect from the throttle case a sleeve of supply of air (see. Head of the Power supply system and release).

2. Start the engine on single turns. Push a finger in the case of a throttle and press it to the union connected to the FIT valve (see an accompanying illustration). Depression should be felt.

3. Warm up the engine to normal working temperature and repeat check. This time depression should be absent. Existence of tension means incomplete closing of the valve which reason low level of cooling liquid or presence of air jams at a path of system of cooling can be – check, execute necessary adjustments. 4. If liquid level in norm, and air is completely removed from system, replace the FIT valve.

Replacement

Before starting procedure performance, wait complete cooling of the engine.

PERFORMANCE ORDER

1. Disconnect from the valve a hose, then turn out fixing bolts (see an illustration above). remove the valve together with sealing rings. At once закупорьте the open end of a hose for the purpose of minimization of losses of cooling liquid. 2. Establish the valve on a regular place (do not forget to replace sealing rings), screw fixing bolts and tighten them with demanded effort. In case of need replace a collar of fastening of a hose. 8 Check level of cooling liquid, in case of need make adjustment (see. Head Routine maintenance).